Configure STP Settings

First Configure Port Transmission Settings.

Note

Extreme Networks and Dell EMC recommend that you enable STP for Dell EMC switches.

Extreme Networks switches can use Spanning Tree Protocol (STP) to activate links with the lowest cost (highest bandwidth), establish backup links where possible, and prevent Layer 2 network loops, which can result in duplicate unicast frames and broadcast storms. Bridge Protocol Data Unit (BPDU) protection is a security feature designed to protect the active STP topology by preventing spoofed BPDU packets from entering the STP domain. BPDU protection is applied to edge ports connected to end-user devices that do not run STP. If an STP BPDU protected port receives packets, this feature disables that port and alerts the network admin.

The BPDU Restrict feature disables the port as soon as a BPDU is received on the BPDU restrict port, blocking the loop. Specify a BPDU recovery timeout, enabling the port after the configured amount of time.

Note

You can enable BPDU Restrict only when Edge port is also enabled.

By default, STP is disabled. Use this task to enable STP and configure the settings for an individual port, on the STP tab.

Toggle STP ON.
Toggle Edge Port ON so the port connects to a user terminal or server, instead of other switches or shared network segments.

A port configured as an edge port will not cause a loop upon network topology changes.
For BPDU Protection, use the drop-down list to change BPDU protection to guard or filter status.
- Guard: Controls whether a port explicitly configured as Edge disables itself upon reception of a BPDU. The port enters the error-disabled state, and is removed from the active topology.
- Filter: Controls whether a port explicitly configured as Edge transmits and receive BPDUs.
- Disabled: Turns off BPDU Protection.
If this port is an STP edge port, select a port priority for STP from the drop-down list.

You can manually designate a port to act as a root bridge by assigning port priorities.
Toggle BPDU Restrict to ON.
For BPDU recovery timeout, input a time between 60-600 seconds.

Note
After the time expiresExtremeCloud‌ IQ re-enables the port automatically.
Select NEXT, or select the Storm Control tab, and continue configuring the port.

See Configure Storm Control.